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Lecture 3, First Law 1-11-08

Lecture 3, First Law 1-11-08 - Sommerfeld on Thermodynamics...

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Sommerfeld on Thermodynamics: Thermodynamics is a funny subject. •The first time you go through the subject, you don't understand it at all. •The second time you go through it, you think you understand it, except for one or two small points. •The third time you go through it, you know you don't understand it, but by that time you are so used to the subject that it doesn't bother you any more.
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ADDITIONS TO WEB PAGE http://www.chem.ucsb.edu/coursepages/ QUIZZES FROM 2007 EXAMS FROM 2007
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The First Law in History Bessler perpetual motion wheel~1712 Industrial revolution begins ~ 1760 Watt steam engine ~ 1770 Lavoisier conservation of mass ~ 1785 Dalton Atomic Theory of Matter ~ 1808 Statements of first law ~ 1850 Gas Kinetic Theory ~ 1860 Beginnings of quantum theory ~ 1900 Theory of special relativity ~ 1905
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Julius Mayer History of the First Law German Physician, Dutch Ship Surgeon, East Indies, 1840 Color of blood from veins Blood drawn from vein of sailors much brighter red in East Indies than Europe Why?
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Heme Group Found Bonded to Proteins
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Effect of oxygen on heme iron Deoxyhemoblobin C N O = = = Plane of heme Distal His (E7) Fe Proximal His (F8) F7 F6 FG1 FG2 FG3 N C Oxygen not bonded Fe not in porphyrin plane
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Effect of oxygen on heme iron Oxyhemoglobin Fe Proximal His (F8) F7 F6 FG1 FG2 FG3 N C Distal His (E7) Oxygen bonds to Iron Fe pulled into plane of porphyrin C N O = = = Plane of Heme
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Conformational Changes between the T and R States of Hemoglobin
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Mayer’s Reasoning Sailors in hot climates use little oxygen to generate body heat – red blood Sailors in cold climates use lots of oxygen to generate body heat – blue blood Work must be done in both climates • HMMMMMMMMMMmmmmmm……… .......................................................
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